Answer:
GPS enabled device
Explanation:
A GPS enabled device is the most helpful for Janelle as it will help her in keeping track of her mileage covered. A GPS device on a watch is the most handy and accurate to train for a 10K race. Mostly, elliptical machines and treadmill is not much helpful in taking a running stride length of 10k race in one go. Therefore, while using elliptical machine outdoors, we have to take more strides to reach long distances and cover miles. The information suggested that GPS devices are more accurate and easily tracks the mile coverage.
